Sash lock



' Jan. 26, 1932. H. D. SEVISON 1,842,882

SASH LOCK Filed March 11, 1929 M, V g [8 I I I y (P) j] Int/6%".- Harryl) fievzlson.

Patented Jan. 26, 1932 UNITED s'rArss PATENT OFFICE nannr n. snvrson, or nnxnenr, Iranians; AssIGnoR To THE ADLAKE COMPANY, OF

CHICAGO, ILLrnoIs, A conrone'rron or ILLINOIS sAsH LOCK Application filed. March 11, 1929. Serial No. 346,025.

The present invention pertains to sash locks of the spring-actuated type, and is particularly concerned with the shaping and ar ran 'ement of the bolt projectlng sprmg with v respect to certain other parts of the lock.

Sash locks of the spring-actuated type are commonly shipped separate from the sash and applied later. The springs in such locks are not completely enclosed until the lock it plates in which the same are partially housed are attached to the sasli,'with the result that the springs frequently come loose from the lock plates in course of shipment and are lost.

The object of the present invention is to so shape and arrange the spring with respect to certain other parts of the lock as to insure the spring remaining in proper position during the interval between the time when the O lock is manufactured and the time when it is assembled with the sash.

One form of the invention is presented herein for the purpose of exemplification, but it will of course be understood thatthe invention is susceptible of embodiment in other modified forms coming equally within the scope of the claims.

' In the accompanying drawings:

Fig. 1 is a side view of one corner of a sash to which a lock of the type under consideration has been applied. i

Fig. 2 is a horizontal section, taken on the line .2-2 of 1, showing the bolt-projecting spring housed within the lock plate; and

Fig. 3 is an inside view of the loclr plate, taken on the line 3-3 of Fig. 2.

The lock assembly shown in the drawings includes a lock plate which is attached by screws 11 to a sash 12, a bolt 13 which is slidhich is pivotally mounted in the lock plate at 15 and has a pin-and-slot connection 16 with the bolt, and a spring 17 which is housed within the lock plate.

The sprin is coiled about a stud 18 in ably mounted in the sash, a finger piece 1% the plate and the ends of the spring'extend from the coiled portion in crossed relation to each other. One end 19 of the spring, which is preferably shorter than the other end, is arranged against the inside of the plate in engagement with a stud 20, while the other end 21 of the spring is disposed adjacent the open face of the plate in engagement with a portion 22 of the finger piece, which finger piece is provided with a lip or shoulder 23 along the outer side of the portion 22 to prevent outward displacement of the end 21. The spring is placed in the position described under tension, in order to cause the end 21 to press resiliently against the finger piece and tend to hold the same in the position shown.

The crossed relation of the spring ends, with theouter end in outwardly interlocked engagement with the finger piece, prevents displacement of the inner end. When the spring is positioned in the lock plate in proper relation to the studs 19 and and the finger piece 14;, the resilience of the stressed spring tends to hold the same in that position, and the lock plate may be shipped and undergo considerable handling without the spring becoming separated from the other parts.

I claim:

1. As a separate article of manufacture, a unitary lock for subsequent application to a sash, comprising a lock plate which is open at one face and is provided with an outwardly extending stud, a finger piece which is pivotally mounted within the lock plate and is provided with a shoulder, and aspring which is coiled helically about the stud with the outer end of the spring in engagement with a por tion of the finger piece in outwardly interlocked association. with the shoulder and with the inner end of the spring in engagement with a portion of the lock plate.

2. As a separate article of manufacture, a

unitary lock for subsequent application to a sash, comprisinga locl: plate which is open at one face and is provided With tWo outwardly extending studs, a finger piece which is pivotally mounted Within the lock plate and is provided with a shoulder, and a spring which is coiled helically about one of the studs with the outer end of the spring in engagement With a portion of the finger piece in outwardly interlocked association With the shoulder and with the inner end of the spring in engagement with the other one of the studs in crossed relation to the other end.

In Witness whereof I have hereunto subscribed my name.

HARRY D. SEVISON. 

